[issue9106] remove numbers from 3-.. level entries in docs toc

[R. David Murray]

R. David Murray <rdmurray at bitdance.com> added the comment:

If the change is confined to the left menu bar only, I'd be happy to have the numbers go away entirely.  But only putting in partial numbers strikes me as an invitation to confusion.  If other people prefer your scheme that's fine with me.  Almost the only time I look at the left menu bar (except on the front page of docs) is when I want to find the 'show source' link.

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versions: +Python 3.1

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